git.oblomov.eu Git - linux-2.6/blob - sound/soc/codecs/wm8900.c

   1 /*
   2  * wm8900.c  --  WM8900 ALSA Soc Audio driver
   3  *
   4  * Copyright 2007, 2008 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * TODO:
  13  *  - Tristating.
  14  *  - TDM.
  15  *  - Jack detect.
  16  *  - FLL source configuration, currently only MCLK is supported.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/moduleparam.h>
  21 #include <linux/kernel.h>
  22 #include <linux/init.h>
  23 #include <linux/delay.h>
  24 #include <linux/pm.h>
  25 #include <linux/i2c.h>
  26 #include <linux/platform_device.h>
  27 #include <sound/core.h>
  28 #include <sound/pcm.h>
  29 #include <sound/pcm_params.h>
  30 #include <sound/soc.h>
  31 #include <sound/soc-dapm.h>
  32 #include <sound/initval.h>
  33 #include <sound/tlv.h>
  34
  35 #include "wm8900.h"
  36
  37 /* WM8900 register space */
  38 #define WM8900_REG_RESET        0x0
  39 #define WM8900_REG_ID           0x0
  40 #define WM8900_REG_POWER1       0x1
  41 #define WM8900_REG_POWER2       0x2
  42 #define WM8900_REG_POWER3       0x3
  43 #define WM8900_REG_AUDIO1       0x4
  44 #define WM8900_REG_AUDIO2       0x5
  45 #define WM8900_REG_CLOCKING1    0x6
  46 #define WM8900_REG_CLOCKING2    0x7
  47 #define WM8900_REG_AUDIO3       0x8
  48 #define WM8900_REG_AUDIO4       0x9
  49 #define WM8900_REG_DACCTRL      0xa
  50 #define WM8900_REG_LDAC_DV      0xb
  51 #define WM8900_REG_RDAC_DV      0xc
  52 #define WM8900_REG_SIDETONE     0xd
  53 #define WM8900_REG_ADCCTRL      0xe
  54 #define WM8900_REG_LADC_DV      0xf
  55 #define WM8900_REG_RADC_DV      0x10
  56 #define WM8900_REG_GPIO         0x12
  57 #define WM8900_REG_INCTL        0x15
  58 #define WM8900_REG_LINVOL       0x16
  59 #define WM8900_REG_RINVOL       0x17
  60 #define WM8900_REG_INBOOSTMIX1  0x18
  61 #define WM8900_REG_INBOOSTMIX2  0x19
  62 #define WM8900_REG_ADCPATH      0x1a
  63 #define WM8900_REG_AUXBOOST     0x1b
  64 #define WM8900_REG_ADDCTL       0x1e
  65 #define WM8900_REG_FLLCTL1      0x24
  66 #define WM8900_REG_FLLCTL2      0x25
  67 #define WM8900_REG_FLLCTL3      0x26
  68 #define WM8900_REG_FLLCTL4      0x27
  69 #define WM8900_REG_FLLCTL5      0x28
  70 #define WM8900_REG_FLLCTL6      0x29
  71 #define WM8900_REG_LOUTMIXCTL1  0x2c
  72 #define WM8900_REG_ROUTMIXCTL1  0x2d
  73 #define WM8900_REG_BYPASS1      0x2e
  74 #define WM8900_REG_BYPASS2      0x2f
  75 #define WM8900_REG_AUXOUT_CTL   0x30
  76 #define WM8900_REG_LOUT1CTL     0x33
  77 #define WM8900_REG_ROUT1CTL     0x34
  78 #define WM8900_REG_LOUT2CTL     0x35
  79 #define WM8900_REG_ROUT2CTL     0x36
  80 #define WM8900_REG_HPCTL1       0x3a
  81 #define WM8900_REG_OUTBIASCTL   0x73
  82
  83 #define WM8900_MAXREG           0x80
  84
  85 #define WM8900_REG_ADDCTL_OUT1_DIS    0x80
  86 #define WM8900_REG_ADDCTL_OUT2_DIS    0x40
  87 #define WM8900_REG_ADDCTL_VMID_DIS    0x20
  88 #define WM8900_REG_ADDCTL_BIAS_SRC    0x10
  89 #define WM8900_REG_ADDCTL_VMID_SOFTST 0x04
  90 #define WM8900_REG_ADDCTL_TEMP_SD     0x02
  91
  92 #define WM8900_REG_GPIO_TEMP_ENA   0x2
  93
  94 #define WM8900_REG_POWER1_STARTUP_BIAS_ENA 0x0100
  95 #define WM8900_REG_POWER1_BIAS_ENA         0x0008
  96 #define WM8900_REG_POWER1_VMID_BUF_ENA     0x0004
  97 #define WM8900_REG_POWER1_FLL_ENA          0x0040
  98
  99 #define WM8900_REG_POWER2_SYSCLK_ENA  0x8000
 100 #define WM8900_REG_POWER2_ADCL_ENA    0x0002
 101 #define WM8900_REG_POWER2_ADCR_ENA    0x0001
 102
 103 #define WM8900_REG_POWER3_DACL_ENA    0x0002
 104 #define WM8900_REG_POWER3_DACR_ENA    0x0001
 105
 106 #define WM8900_REG_AUDIO1_AIF_FMT_MASK 0x0018
 107 #define WM8900_REG_AUDIO1_LRCLK_INV    0x0080
 108 #define WM8900_REG_AUDIO1_BCLK_INV     0x0100
 109
 110 #define WM8900_REG_CLOCKING1_BCLK_DIR   0x1
 111 #define WM8900_REG_CLOCKING1_MCLK_SRC   0x100
 112 #define WM8900_REG_CLOCKING1_BCLK_MASK  (~0x01e)
 113 #define WM8900_REG_CLOCKING1_OPCLK_MASK (~0x7000)
 114
 115 #define WM8900_REG_CLOCKING2_ADC_CLKDIV 0xe0
 116 #define WM8900_REG_CLOCKING2_DAC_CLKDIV 0x1c
 117
 118 #define WM8900_REG_DACCTRL_MUTE          0x004
 119 #define WM8900_REG_DACCTRL_AIF_LRCLKRATE 0x400
 120
 121 #define WM8900_REG_AUDIO3_ADCLRC_DIR    0x0800
 122
 123 #define WM8900_REG_AUDIO4_DACLRC_DIR    0x0800
 124
 125 #define WM8900_REG_FLLCTL1_OSC_ENA    0x100
 126
 127 #define WM8900_REG_FLLCTL6_FLL_SLOW_LOCK_REF 0x100
 128
 129 #define WM8900_REG_HPCTL1_HP_IPSTAGE_ENA 0x80
 130 #define WM8900_REG_HPCTL1_HP_OPSTAGE_ENA 0x40
 131 #define WM8900_REG_HPCTL1_HP_CLAMP_IP    0x20
 132 #define WM8900_REG_HPCTL1_HP_CLAMP_OP    0x10
 133 #define WM8900_REG_HPCTL1_HP_SHORT       0x08
 134 #define WM8900_REG_HPCTL1_HP_SHORT2      0x04
 135
 136 #define WM8900_LRC_MASK 0xfc00
 137
 138 struct snd_soc_codec_device soc_codec_dev_wm8900;
 139
 140 struct wm8900_priv {
 141         u32 fll_in; /* FLL input frequency */
 142         u32 fll_out; /* FLL output frequency */
 143 };
 144
 145 /*
 146  * wm8900 register cache.  We can't read the entire register space and we
 147  * have slow control buses so we cache the registers.
 148  */
 149 static const u16 wm8900_reg_defaults[WM8900_MAXREG] = {
 150         0x8900, 0x0000,
 151         0xc000, 0x0000,
 152         0x4050, 0x4000,
 153         0x0008, 0x0000,
 154         0x0040, 0x0040,
 155         0x1004, 0x00c0,
 156         0x00c0, 0x0000,
 157         0x0100, 0x00c0,
 158         0x00c0, 0x0000,
 159         0xb001, 0x0000,
 160         0x0000, 0x0044,
 161         0x004c, 0x004c,
 162         0x0044, 0x0044,
 163         0x0000, 0x0044,
 164         0x0000, 0x0000,
 165         0x0002, 0x0000,
 166         0x0000, 0x0000,
 167         0x0000, 0x0000,
 168         0x0008, 0x0000,
 169         0x0000, 0x0008,
 170         0x0097, 0x0100,
 171         0x0000, 0x0000,
 172         0x0050, 0x0050,
 173         0x0055, 0x0055,
 174         0x0055, 0x0000,
 175         0x0000, 0x0079,
 176         0x0079, 0x0079,
 177         0x0079, 0x0000,
 178         /* Remaining registers all zero */
 179 };
 180
 181 /*
 182  * read wm8900 register cache
 183  */
 184 static inline unsigned int wm8900_read_reg_cache(struct snd_soc_codec *codec,
 185         unsigned int reg)
 186 {
 187         u16 *cache = codec->reg_cache;
 188
 189         BUG_ON(reg >= WM8900_MAXREG);
 190
 191         if (reg == WM8900_REG_ID)
 192                 return 0;
 193
 194         return cache[reg];
 195 }
 196
 197 /*
 198  * write wm8900 register cache
 199  */
 200 static inline void wm8900_write_reg_cache(struct snd_soc_codec *codec,
 201         u16 reg, unsigned int value)
 202 {
 203         u16 *cache = codec->reg_cache;
 204
 205         BUG_ON(reg >= WM8900_MAXREG);
 206
 207         cache[reg] = value;
 208 }
 209
 210 /*
 211  * write to the WM8900 register space
 212  */
 213 static int wm8900_write(struct snd_soc_codec *codec, unsigned int reg,
 214                         unsigned int value)
 215 {
 216         u8 data[3];
 217
 218         if (value == wm8900_read_reg_cache(codec, reg))
 219                 return 0;
 220
 221         /* data is
 222          *   D15..D9 WM8900 register offset
 223          *   D8...D0 register data
 224          */
 225         data[0] = reg;
 226         data[1] = value >> 8;
 227         data[2] = value & 0x00ff;
 228
 229         wm8900_write_reg_cache(codec, reg, value);
 230         if (codec->hw_write(codec->control_data, data, 3) == 3)
 231                 return 0;
 232         else
 233                 return -EIO;
 234 }
 235
 236 /*
 237  * Read from the wm8900.
 238  */
 239 static unsigned int wm8900_chip_read(struct snd_soc_codec *codec, u8 reg)
 240 {
 241         struct i2c_msg xfer[2];
 242         u16 data;
 243         int ret;
 244         struct i2c_client *client = codec->control_data;
 245
 246         BUG_ON(reg != WM8900_REG_ID && reg != WM8900_REG_POWER1);
 247
 248         /* Write register */
 249         xfer[0].addr = client->addr;
 250         xfer[0].flags = 0;
 251         xfer[0].len = 1;
 252         xfer[0].buf = &reg;
 253
 254         /* Read data */
 255         xfer[1].addr = client->addr;
 256         xfer[1].flags = I2C_M_RD;
 257         xfer[1].len = 2;
 258         xfer[1].buf = (u8 *)&data;
 259
 260         ret = i2c_transfer(client->adapter, xfer, 2);
 261         if (ret != 2) {
 262                 printk(KERN_CRIT "i2c_transfer returned %d\n", ret);
 263                 return 0;
 264         }
 265
 266         return (data >> 8) | ((data & 0xff) << 8);
 267 }
 268
 269 /*
 270  * Read from the WM8900 register space.  Most registers can't be read
 271  * and are therefore supplied from cache.
 272  */
 273 static unsigned int wm8900_read(struct snd_soc_codec *codec, unsigned int reg)
 274 {
 275         switch (reg) {
 276         case WM8900_REG_ID:
 277                 return wm8900_chip_read(codec, reg);
 278         default:
 279                 return wm8900_read_reg_cache(codec, reg);
 280         }
 281 }
 282
 283 static void wm8900_reset(struct snd_soc_codec *codec)
 284 {
 285         wm8900_write(codec, WM8900_REG_RESET, 0);
 286
 287         memcpy(codec->reg_cache, wm8900_reg_defaults,
 288                sizeof(codec->reg_cache));
 289 }
 290
 291 static int wm8900_hp_event(struct snd_soc_dapm_widget *w,
 292                            struct snd_kcontrol *kcontrol, int event)
 293 {
 294         struct snd_soc_codec *codec = w->codec;
 295         u16 hpctl1 = wm8900_read(codec, WM8900_REG_HPCTL1);
 296
 297         switch (event) {
 298         case SND_SOC_DAPM_PRE_PMU:
 299                 /* Clamp headphone outputs */
 300                 hpctl1 = WM8900_REG_HPCTL1_HP_CLAMP_IP |
 301                         WM8900_REG_HPCTL1_HP_CLAMP_OP;
 302                 wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
 303                 break;
 304
 305         case SND_SOC_DAPM_POST_PMU:
 306                 /* Enable the input stage */
 307                 hpctl1 &= ~WM8900_REG_HPCTL1_HP_CLAMP_IP;
 308                 hpctl1 |= WM8900_REG_HPCTL1_HP_SHORT |
 309                         WM8900_REG_HPCTL1_HP_SHORT2 |
 310                         WM8900_REG_HPCTL1_HP_IPSTAGE_ENA;
 311                 wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
 312
 313                 msleep(400);
 314
 315                 /* Enable the output stage */
 316                 hpctl1 &= ~WM8900_REG_HPCTL1_HP_CLAMP_OP;
 317                 hpctl1 |= WM8900_REG_HPCTL1_HP_OPSTAGE_ENA;
 318                 wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
 319
 320                 /* Remove the shorts */
 321                 hpctl1 &= ~WM8900_REG_HPCTL1_HP_SHORT2;
 322                 wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
 323                 hpctl1 &= ~WM8900_REG_HPCTL1_HP_SHORT;
 324                 wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
 325                 break;
 326
 327         case SND_SOC_DAPM_PRE_PMD:
 328                 /* Short the output */
 329                 hpctl1 |= WM8900_REG_HPCTL1_HP_SHORT;
 330                 wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
 331
 332                 /* Disable the output stage */
 333                 hpctl1 &= ~WM8900_REG_HPCTL1_HP_OPSTAGE_ENA;
 334                 wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
 335
 336                 /* Clamp the outputs and power down input */
 337                 hpctl1 |= WM8900_REG_HPCTL1_HP_CLAMP_IP |
 338                         WM8900_REG_HPCTL1_HP_CLAMP_OP;
 339                 hpctl1 &= ~WM8900_REG_HPCTL1_HP_IPSTAGE_ENA;
 340                 wm8900_write(codec, WM8900_REG_HPCTL1, hpctl1);
 341                 break;
 342
 343         case SND_SOC_DAPM_POST_PMD:
 344                 /* Disable everything */
 345                 wm8900_write(codec, WM8900_REG_HPCTL1, 0);
 346                 break;
 347
 348         default:
 349                 BUG();
 350         }
 351
 352         return 0;
 353 }
 354
 355 static const DECLARE_TLV_DB_SCALE(out_pga_tlv, -5700, 100, 0);
 356
 357 static const DECLARE_TLV_DB_SCALE(out_mix_tlv, -1500, 300, 0);
 358
 359 static const DECLARE_TLV_DB_SCALE(in_boost_tlv, -1200, 600, 0);
 360
 361 static const DECLARE_TLV_DB_SCALE(in_pga_tlv, -1200, 100, 0);
 362
 363 static const DECLARE_TLV_DB_SCALE(dac_boost_tlv, 0, 600, 0);
 364
 365 static const DECLARE_TLV_DB_SCALE(dac_tlv, -7200, 75, 1);
 366
 367 static const DECLARE_TLV_DB_SCALE(adc_svol_tlv, -3600, 300, 0);
 368
 369 static const DECLARE_TLV_DB_SCALE(adc_tlv, -7200, 75, 1);
 370
 371 static const char *mic_bias_level_txt[] = { "0.9*AVDD", "0.65*AVDD" };
 372
 373 static const struct soc_enum mic_bias_level =
 374 SOC_ENUM_SINGLE(WM8900_REG_INCTL, 8, 2, mic_bias_level_txt);
 375
 376 static const char *dac_mute_rate_txt[] = { "Fast", "Slow" };
 377
 378 static const struct soc_enum dac_mute_rate =
 379 SOC_ENUM_SINGLE(WM8900_REG_DACCTRL, 7, 2, dac_mute_rate_txt);
 380
 381 static const char *dac_deemphasis_txt[] = {
 382         "Disabled", "32kHz", "44.1kHz", "48kHz"
 383 };
 384
 385 static const struct soc_enum dac_deemphasis =
 386 SOC_ENUM_SINGLE(WM8900_REG_DACCTRL, 4, 4, dac_deemphasis_txt);
 387
 388 static const char *adc_hpf_cut_txt[] = {
 389         "Hi-fi mode", "Voice mode 1", "Voice mode 2", "Voice mode 3"
 390 };
 391
 392 static const struct soc_enum adc_hpf_cut =
 393 SOC_ENUM_SINGLE(WM8900_REG_ADCCTRL, 5, 4, adc_hpf_cut_txt);
 394
 395 static const char *lr_txt[] = {
 396         "Left", "Right"
 397 };
 398
 399 static const struct soc_enum aifl_src =
 400 SOC_ENUM_SINGLE(WM8900_REG_AUDIO1, 15, 2, lr_txt);
 401
 402 static const struct soc_enum aifr_src =
 403 SOC_ENUM_SINGLE(WM8900_REG_AUDIO1, 14, 2, lr_txt);
 404
 405 static const struct soc_enum dacl_src =
 406 SOC_ENUM_SINGLE(WM8900_REG_AUDIO2, 15, 2, lr_txt);
 407
 408 static const struct soc_enum dacr_src =
 409 SOC_ENUM_SINGLE(WM8900_REG_AUDIO2, 14, 2, lr_txt);
 410
 411 static const char *sidetone_txt[] = {
 412         "Disabled", "Left ADC", "Right ADC"
 413 };
 414
 415 static const struct soc_enum dacl_sidetone =
 416 SOC_ENUM_SINGLE(WM8900_REG_SIDETONE, 2, 3, sidetone_txt);
 417
 418 static const struct soc_enum dacr_sidetone =
 419 SOC_ENUM_SINGLE(WM8900_REG_SIDETONE, 0, 3, sidetone_txt);
 420
 421 static const struct snd_kcontrol_new wm8900_snd_controls[] = {
 422 SOC_ENUM("Mic Bias Level", mic_bias_level),
 423
 424 SOC_SINGLE_TLV("Left Input PGA Volume", WM8900_REG_LINVOL, 0, 31, 0,
 425                in_pga_tlv),
 426 SOC_SINGLE("Left Input PGA Switch", WM8900_REG_LINVOL, 6, 1, 1),
 427 SOC_SINGLE("Left Input PGA ZC Switch", WM8900_REG_LINVOL, 7, 1, 0),
 428
 429 SOC_SINGLE_TLV("Right Input PGA Volume", WM8900_REG_RINVOL, 0, 31, 0,
 430                in_pga_tlv),
 431 SOC_SINGLE("Right Input PGA Switch", WM8900_REG_RINVOL, 6, 1, 1),
 432 SOC_SINGLE("Right Input PGA ZC Switch", WM8900_REG_RINVOL, 7, 1, 0),
 433
 434 SOC_SINGLE("DAC Soft Mute Switch", WM8900_REG_DACCTRL, 6, 1, 1),
 435 SOC_ENUM("DAC Mute Rate", dac_mute_rate),
 436 SOC_SINGLE("DAC Mono Switch", WM8900_REG_DACCTRL, 9, 1, 0),
 437 SOC_ENUM("DAC Deemphasis", dac_deemphasis),
 438 SOC_SINGLE("DAC Sloping Stopband Filter Switch", WM8900_REG_DACCTRL, 8, 1, 0),
 439 SOC_SINGLE("DAC Sigma-Delta Modulator Clock Switch", WM8900_REG_DACCTRL,
 440            12, 1, 0),
 441
 442 SOC_SINGLE("ADC HPF Switch", WM8900_REG_ADCCTRL, 8, 1, 0),
 443 SOC_ENUM("ADC HPF Cut-Off", adc_hpf_cut),
 444 SOC_DOUBLE("ADC Invert Switch", WM8900_REG_ADCCTRL, 1, 0, 1, 0),
 445 SOC_SINGLE_TLV("Left ADC Sidetone Volume", WM8900_REG_SIDETONE, 9, 12, 0,
 446                adc_svol_tlv),
 447 SOC_SINGLE_TLV("Right ADC Sidetone Volume", WM8900_REG_SIDETONE, 5, 12, 0,
 448                adc_svol_tlv),
 449 SOC_ENUM("Left Digital Audio Source", aifl_src),
 450 SOC_ENUM("Right Digital Audio Source", aifr_src),
 451
 452 SOC_SINGLE_TLV("DAC Input Boost Volume", WM8900_REG_AUDIO2, 10, 4, 0,
 453                dac_boost_tlv),
 454 SOC_ENUM("Left DAC Source", dacl_src),
 455 SOC_ENUM("Right DAC Source", dacr_src),
 456 SOC_ENUM("Left DAC Sidetone", dacl_sidetone),
 457 SOC_ENUM("Right DAC Sidetone", dacr_sidetone),
 458 SOC_DOUBLE("DAC Invert Switch", WM8900_REG_DACCTRL, 1, 0, 1, 0),
 459
 460 SOC_DOUBLE_R_TLV("Digital Playback Volume",
 461                  WM8900_REG_LDAC_DV, WM8900_REG_RDAC_DV,
 462                  1, 96, 0, dac_tlv),
 463 SOC_DOUBLE_R_TLV("Digital Capture Volume",
 464                  WM8900_REG_LADC_DV, WM8900_REG_RADC_DV, 1, 119, 0, adc_tlv),
 465
 466 SOC_SINGLE_TLV("LINPUT3 Bypass Volume", WM8900_REG_LOUTMIXCTL1, 4, 7, 0,
 467                out_mix_tlv),
 468 SOC_SINGLE_TLV("RINPUT3 Bypass Volume", WM8900_REG_ROUTMIXCTL1, 4, 7, 0,
 469                out_mix_tlv),
 470 SOC_SINGLE_TLV("Left AUX Bypass Volume", WM8900_REG_AUXOUT_CTL, 4, 7, 0,
 471                out_mix_tlv),
 472 SOC_SINGLE_TLV("Right AUX Bypass Volume", WM8900_REG_AUXOUT_CTL, 0, 7, 0,
 473                out_mix_tlv),
 474
 475 SOC_SINGLE_TLV("LeftIn to RightOut Mixer Volume", WM8900_REG_BYPASS1, 0, 7, 0,
 476                out_mix_tlv),
 477 SOC_SINGLE_TLV("LeftIn to LeftOut Mixer Volume", WM8900_REG_BYPASS1, 4, 7, 0,
 478                out_mix_tlv),
 479 SOC_SINGLE_TLV("RightIn to LeftOut Mixer Volume", WM8900_REG_BYPASS2, 0, 7, 0,
 480                out_mix_tlv),
 481 SOC_SINGLE_TLV("RightIn to RightOut Mixer Volume", WM8900_REG_BYPASS2, 4, 7, 0,
 482                out_mix_tlv),
 483
 484 SOC_SINGLE_TLV("IN2L Boost Volume", WM8900_REG_INBOOSTMIX1, 0, 3, 0,
 485                in_boost_tlv),
 486 SOC_SINGLE_TLV("IN3L Boost Volume", WM8900_REG_INBOOSTMIX1, 4, 3, 0,
 487                in_boost_tlv),
 488 SOC_SINGLE_TLV("IN2R Boost Volume", WM8900_REG_INBOOSTMIX2, 0, 3, 0,
 489                in_boost_tlv),
 490 SOC_SINGLE_TLV("IN3R Boost Volume", WM8900_REG_INBOOSTMIX2, 4, 3, 0,
 491                in_boost_tlv),
 492 SOC_SINGLE_TLV("Left AUX Boost Volume", WM8900_REG_AUXBOOST, 4, 3, 0,
 493                in_boost_tlv),
 494 SOC_SINGLE_TLV("Right AUX Boost Volume", WM8900_REG_AUXBOOST, 0, 3, 0,
 495                in_boost_tlv),
 496
 497 SOC_DOUBLE_R_TLV("LINEOUT1 Volume", WM8900_REG_LOUT1CTL, WM8900_REG_ROUT1CTL,
 498                0, 63, 0, out_pga_tlv),
 499 SOC_DOUBLE_R("LINEOUT1 Switch", WM8900_REG_LOUT1CTL, WM8900_REG_ROUT1CTL,
 500              6, 1, 1),
 501 SOC_DOUBLE_R("LINEOUT1 ZC Switch", WM8900_REG_LOUT1CTL, WM8900_REG_ROUT1CTL,
 502              7, 1, 0),
 503
 504 SOC_DOUBLE_R_TLV("LINEOUT2 Volume",
 505                  WM8900_REG_LOUT2CTL, WM8900_REG_ROUT2CTL,
 506                  0, 63, 0, out_pga_tlv),
 507 SOC_DOUBLE_R("LINEOUT2 Switch",
 508              WM8900_REG_LOUT2CTL, WM8900_REG_ROUT2CTL, 6, 1, 1),
 509 SOC_DOUBLE_R("LINEOUT2 ZC Switch",
 510              WM8900_REG_LOUT2CTL, WM8900_REG_ROUT2CTL, 7, 1, 0),
 511 SOC_SINGLE("LINEOUT2 LP -12dB", WM8900_REG_LOUTMIXCTL1,
 512            0, 1, 1),
 513
 514 };
 515
 516 /* add non dapm controls */
 517 static int wm8900_add_controls(struct snd_soc_codec *codec)
 518 {
 519         int err, i;
 520
 521         for (i = 0; i < ARRAY_SIZE(wm8900_snd_controls); i++) {
 522                 err = snd_ctl_add(codec->card,
 523                                   snd_soc_cnew(&wm8900_snd_controls[i],
 524                                                codec, NULL));
 525                 if (err < 0)
 526                         return err;
 527         }
 528
 529         return 0;
 530 }
 531
 532 static const struct snd_kcontrol_new wm8900_dapm_loutput2_control =
 533 SOC_DAPM_SINGLE("LINEOUT2L Switch", WM8900_REG_POWER3, 6, 1, 0);
 534
 535 static const struct snd_kcontrol_new wm8900_dapm_routput2_control =
 536 SOC_DAPM_SINGLE("LINEOUT2R Switch", WM8900_REG_POWER3, 5, 1, 0);
 537
 538 static const struct snd_kcontrol_new wm8900_loutmix_controls[] = {
 539 SOC_DAPM_SINGLE("LINPUT3 Bypass Switch", WM8900_REG_LOUTMIXCTL1, 7, 1, 0),
 540 SOC_DAPM_SINGLE("AUX Bypass Switch", WM8900_REG_AUXOUT_CTL, 7, 1, 0),
 541 SOC_DAPM_SINGLE("Left Input Mixer Switch", WM8900_REG_BYPASS1, 7, 1, 0),
 542 SOC_DAPM_SINGLE("Right Input Mixer Switch", WM8900_REG_BYPASS2, 3, 1, 0),
 543 SOC_DAPM_SINGLE("DACL Switch", WM8900_REG_LOUTMIXCTL1, 8, 1, 0),
 544 };
 545
 546 static const struct snd_kcontrol_new wm8900_routmix_controls[] = {
 547 SOC_DAPM_SINGLE("RINPUT3 Bypass Switch", WM8900_REG_ROUTMIXCTL1, 7, 1, 0),
 548 SOC_DAPM_SINGLE("AUX Bypass Switch", WM8900_REG_AUXOUT_CTL, 3, 1, 0),
 549 SOC_DAPM_SINGLE("Left Input Mixer Switch", WM8900_REG_BYPASS1, 3, 1, 0),
 550 SOC_DAPM_SINGLE("Right Input Mixer Switch", WM8900_REG_BYPASS2, 7, 1, 0),
 551 SOC_DAPM_SINGLE("DACR Switch", WM8900_REG_ROUTMIXCTL1, 8, 1, 0),
 552 };
 553
 554 static const struct snd_kcontrol_new wm8900_linmix_controls[] = {
 555 SOC_DAPM_SINGLE("LINPUT2 Switch", WM8900_REG_INBOOSTMIX1, 2, 1, 1),
 556 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8900_REG_INBOOSTMIX1, 6, 1, 1),
 557 SOC_DAPM_SINGLE("AUX Switch", WM8900_REG_AUXBOOST, 6, 1, 1),
 558 SOC_DAPM_SINGLE("Input PGA Switch", WM8900_REG_ADCPATH, 6, 1, 0),
 559 };
 560
 561 static const struct snd_kcontrol_new wm8900_rinmix_controls[] = {
 562 SOC_DAPM_SINGLE("RINPUT2 Switch", WM8900_REG_INBOOSTMIX2, 2, 1, 1),
 563 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8900_REG_INBOOSTMIX2, 6, 1, 1),
 564 SOC_DAPM_SINGLE("AUX Switch", WM8900_REG_AUXBOOST, 2, 1, 1),
 565 SOC_DAPM_SINGLE("Input PGA Switch", WM8900_REG_ADCPATH, 2, 1, 0),
 566 };
 567
 568 static const struct snd_kcontrol_new wm8900_linpga_controls[] = {
 569 SOC_DAPM_SINGLE("LINPUT1 Switch", WM8900_REG_INCTL, 6, 1, 0),
 570 SOC_DAPM_SINGLE("LINPUT2 Switch", WM8900_REG_INCTL, 5, 1, 0),
 571 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8900_REG_INCTL, 4, 1, 0),
 572 };
 573
 574 static const struct snd_kcontrol_new wm8900_rinpga_controls[] = {
 575 SOC_DAPM_SINGLE("RINPUT1 Switch", WM8900_REG_INCTL, 2, 1, 0),
 576 SOC_DAPM_SINGLE("RINPUT2 Switch", WM8900_REG_INCTL, 1, 1, 0),
 577 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8900_REG_INCTL, 0, 1, 0),
 578 };
 579
 580 static const char *wm9700_lp_mux[] = { "Disabled", "Enabled" };
 581
 582 static const struct soc_enum wm8900_lineout2_lp_mux =
 583 SOC_ENUM_SINGLE(WM8900_REG_LOUTMIXCTL1, 1, 2, wm9700_lp_mux);
 584
 585 static const struct snd_kcontrol_new wm8900_lineout2_lp =
 586 SOC_DAPM_ENUM("Route", wm8900_lineout2_lp_mux);
 587
 588 static const struct snd_soc_dapm_widget wm8900_dapm_widgets[] = {
 589
 590 /* Externally visible pins */
 591 SND_SOC_DAPM_OUTPUT("LINEOUT1L"),
 592 SND_SOC_DAPM_OUTPUT("LINEOUT1R"),
 593 SND_SOC_DAPM_OUTPUT("LINEOUT2L"),
 594 SND_SOC_DAPM_OUTPUT("LINEOUT2R"),
 595 SND_SOC_DAPM_OUTPUT("HP_L"),
 596 SND_SOC_DAPM_OUTPUT("HP_R"),
 597
 598 SND_SOC_DAPM_INPUT("RINPUT1"),
 599 SND_SOC_DAPM_INPUT("LINPUT1"),
 600 SND_SOC_DAPM_INPUT("RINPUT2"),
 601 SND_SOC_DAPM_INPUT("LINPUT2"),
 602 SND_SOC_DAPM_INPUT("RINPUT3"),
 603 SND_SOC_DAPM_INPUT("LINPUT3"),
 604 SND_SOC_DAPM_INPUT("AUX"),
 605
 606 SND_SOC_DAPM_VMID("VMID"),
 607
 608 /* Input */
 609 SND_SOC_DAPM_MIXER("Left Input PGA", WM8900_REG_POWER2, 3, 0,
 610                    wm8900_linpga_controls,
 611                    ARRAY_SIZE(wm8900_linpga_controls)),
 612 SND_SOC_DAPM_MIXER("Right Input PGA", WM8900_REG_POWER2, 2, 0,
 613                    wm8900_rinpga_controls,
 614                    ARRAY_SIZE(wm8900_rinpga_controls)),
 615
 616 SND_SOC_DAPM_MIXER("Left Input Mixer", WM8900_REG_POWER2, 5, 0,
 617                    wm8900_linmix_controls,
 618                    ARRAY_SIZE(wm8900_linmix_controls)),
 619 SND_SOC_DAPM_MIXER("Right Input Mixer", WM8900_REG_POWER2, 4, 0,
 620                    wm8900_rinmix_controls,
 621                    ARRAY_SIZE(wm8900_rinmix_controls)),
 622
 623 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8900_REG_POWER1, 4, 0),
 624
 625 SND_SOC_DAPM_ADC("ADCL", "Left HiFi Capture", WM8900_REG_POWER2, 1, 0),
 626 SND_SOC_DAPM_ADC("ADCR", "Right HiFi Capture", WM8900_REG_POWER2, 0, 0),
 627
 628 /* Output */
 629 SND_SOC_DAPM_DAC("DACL", "Left HiFi Playback", WM8900_REG_POWER3, 1, 0),
 630 SND_SOC_DAPM_DAC("DACR", "Right HiFi Playback", WM8900_REG_POWER3, 0, 0),
 631
 632 SND_SOC_DAPM_PGA_E("Headphone Amplifier", WM8900_REG_POWER3, 7, 0, NULL, 0,
 633                    wm8900_hp_event,
 634                    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
 635                    SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
 636
 637 SND_SOC_DAPM_PGA("LINEOUT1L PGA", WM8900_REG_POWER2, 8, 0, NULL, 0),
 638 SND_SOC_DAPM_PGA("LINEOUT1R PGA", WM8900_REG_POWER2, 7, 0, NULL, 0),
 639
 640 SND_SOC_DAPM_MUX("LINEOUT2 LP", SND_SOC_NOPM, 0, 0, &wm8900_lineout2_lp),
 641 SND_SOC_DAPM_PGA("LINEOUT2L PGA", WM8900_REG_POWER3, 6, 0, NULL, 0),
 642 SND_SOC_DAPM_PGA("LINEOUT2R PGA", WM8900_REG_POWER3, 5, 0, NULL, 0),
 643
 644 SND_SOC_DAPM_MIXER("Left Output Mixer", WM8900_REG_POWER3, 3, 0,
 645                    wm8900_loutmix_controls,
 646                    ARRAY_SIZE(wm8900_loutmix_controls)),
 647 SND_SOC_DAPM_MIXER("Right Output Mixer", WM8900_REG_POWER3, 2, 0,
 648                    wm8900_routmix_controls,
 649                    ARRAY_SIZE(wm8900_routmix_controls)),
 650 };
 651
 652 /* Target, Path, Source */
 653 static const struct snd_soc_dapm_route audio_map[] = {
 654 /* Inputs */
 655 {"Left Input PGA", "LINPUT1 Switch", "LINPUT1"},
 656 {"Left Input PGA", "LINPUT2 Switch", "LINPUT2"},
 657 {"Left Input PGA", "LINPUT3 Switch", "LINPUT3"},
 658
 659 {"Right Input PGA", "RINPUT1 Switch", "RINPUT1"},
 660 {"Right Input PGA", "RINPUT2 Switch", "RINPUT2"},
 661 {"Right Input PGA", "RINPUT3 Switch", "RINPUT3"},
 662
 663 {"Left Input Mixer", "LINPUT2 Switch", "LINPUT2"},
 664 {"Left Input Mixer", "LINPUT3 Switch", "LINPUT3"},
 665 {"Left Input Mixer", "AUX Switch", "AUX"},
 666 {"Left Input Mixer", "Input PGA Switch", "Left Input PGA"},
 667
 668 {"Right Input Mixer", "RINPUT2 Switch", "RINPUT2"},
 669 {"Right Input Mixer", "RINPUT3 Switch", "RINPUT3"},
 670 {"Right Input Mixer", "AUX Switch", "AUX"},
 671 {"Right Input Mixer", "Input PGA Switch", "Right Input PGA"},
 672
 673 {"ADCL", NULL, "Left Input Mixer"},
 674 {"ADCR", NULL, "Right Input Mixer"},
 675
 676 /* Outputs */
 677 {"LINEOUT1L", NULL, "LINEOUT1L PGA"},
 678 {"LINEOUT1L PGA", NULL, "Left Output Mixer"},
 679 {"LINEOUT1R", NULL, "LINEOUT1R PGA"},
 680 {"LINEOUT1R PGA", NULL, "Right Output Mixer"},
 681
 682 {"LINEOUT2L PGA", NULL, "Left Output Mixer"},
 683 {"LINEOUT2 LP", "Disabled", "LINEOUT2L PGA"},
 684 {"LINEOUT2 LP", "Enabled", "Left Output Mixer"},
 685 {"LINEOUT2L", NULL, "LINEOUT2 LP"},
 686
 687 {"LINEOUT2R PGA", NULL, "Right Output Mixer"},
 688 {"LINEOUT2 LP", "Disabled", "LINEOUT2R PGA"},
 689 {"LINEOUT2 LP", "Enabled", "Right Output Mixer"},
 690 {"LINEOUT2R", NULL, "LINEOUT2 LP"},
 691
 692 {"Left Output Mixer", "LINPUT3 Bypass Switch", "LINPUT3"},
 693 {"Left Output Mixer", "AUX Bypass Switch", "AUX"},
 694 {"Left Output Mixer", "Left Input Mixer Switch", "Left Input Mixer"},
 695 {"Left Output Mixer", "Right Input Mixer Switch", "Right Input Mixer"},
 696 {"Left Output Mixer", "DACL Switch", "DACL"},
 697
 698 {"Right Output Mixer", "RINPUT3 Bypass Switch", "RINPUT3"},
 699 {"Right Output Mixer", "AUX Bypass Switch", "AUX"},
 700 {"Right Output Mixer", "Left Input Mixer Switch", "Left Input Mixer"},
 701 {"Right Output Mixer", "Right Input Mixer Switch", "Right Input Mixer"},
 702 {"Right Output Mixer", "DACR Switch", "DACR"},
 703
 704 /* Note that the headphone output stage needs to be connected
 705  * externally to LINEOUT2 via DC blocking capacitors.  Other
 706  * configurations are not supported.
 707  *
 708  * Note also that left and right headphone paths are treated as a
 709  * mono path.
 710  */
 711 {"Headphone Amplifier", NULL, "LINEOUT2 LP"},
 712 {"Headphone Amplifier", NULL, "LINEOUT2 LP"},
 713 {"HP_L", NULL, "Headphone Amplifier"},
 714 {"HP_R", NULL, "Headphone Amplifier"},
 715 };
 716
 717 static int wm8900_add_widgets(struct snd_soc_codec *codec)
 718 {
 719         snd_soc_dapm_new_controls(codec, wm8900_dapm_widgets,
 720                                   ARRAY_SIZE(wm8900_dapm_widgets));
 721
 722         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 723
 724         snd_soc_dapm_new_widgets(codec);
 725
 726         return 0;
 727 }
 728
 729 static int wm8900_hw_params(struct snd_pcm_substream *substream,
 730         struct snd_pcm_hw_params *params)
 731 {
 732         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 733         struct snd_soc_device *socdev = rtd->socdev;
 734         struct snd_soc_codec *codec = socdev->codec;
 735         u16 reg;
 736
 737         reg = wm8900_read(codec, WM8900_REG_AUDIO1) & ~0x60;
 738
 739         switch (params_format(params)) {
 740         case SNDRV_PCM_FORMAT_S16_LE:
 741                 break;
 742         case SNDRV_PCM_FORMAT_S20_3LE:
 743                 reg |= 0x20;
 744                 break;
 745         case SNDRV_PCM_FORMAT_S24_LE:
 746                 reg |= 0x40;
 747                 break;
 748         case SNDRV_PCM_FORMAT_S32_LE:
 749                 reg |= 0x60;
 750                 break;
 751         default:
 752                 return -EINVAL;
 753         }
 754
 755         wm8900_write(codec, WM8900_REG_AUDIO1, reg);
 756
 757         return 0;
 758 }
 759
 760 /* FLL divisors */
 761 struct _fll_div {
 762         u16 fll_ratio;
 763         u16 fllclk_div;
 764         u16 fll_slow_lock_ref;
 765         u16 n;
 766         u16 k;
 767 };
 768
 769 /* The size in bits of the FLL divide multiplied by 10
 770  * to allow rounding later */
 771 #define FIXED_FLL_SIZE ((1 << 16) * 10)
 772
 773 static int fll_factors(struct _fll_div *fll_div, unsigned int Fref,
 774                        unsigned int Fout)
 775 {
 776         u64 Kpart;
 777         unsigned int K, Ndiv, Nmod, target;
 778         unsigned int div;
 779
 780         BUG_ON(!Fout);
 781
 782         /* The FLL must run at 90-100MHz which is then scaled down to
 783          * the output value by FLLCLK_DIV. */
 784         target = Fout;
 785         div = 1;
 786         while (target < 90000000) {
 787                 div *= 2;
 788                 target *= 2;
 789         }
 790
 791         if (target > 100000000)
 792                 printk(KERN_WARNING "wm8900: FLL rate %d out of range, Fref=%d"
 793                        " Fout=%d\n", target, Fref, Fout);
 794         if (div > 32) {
 795                 printk(KERN_ERR "wm8900: Invalid FLL division rate %u, "
 796                        "Fref=%d, Fout=%d, target=%d\n",
 797                        div, Fref, Fout, target);
 798                 return -EINVAL;
 799         }
 800
 801         fll_div->fllclk_div = div >> 2;
 802
 803         if (Fref < 48000)
 804                 fll_div->fll_slow_lock_ref = 1;
 805         else
 806                 fll_div->fll_slow_lock_ref = 0;
 807
 808         Ndiv = target / Fref;
 809
 810         if (Fref < 1000000)
 811                 fll_div->fll_ratio = 8;
 812         else
 813                 fll_div->fll_ratio = 1;
 814
 815         fll_div->n = Ndiv / fll_div->fll_ratio;
 816         Nmod = (target / fll_div->fll_ratio) % Fref;
 817
 818         /* Calculate fractional part - scale up so we can round. */
 819         Kpart = FIXED_FLL_SIZE * (long long)Nmod;
 820
 821         do_div(Kpart, Fref);
 822
 823         K = Kpart & 0xFFFFFFFF;
 824
 825         if ((K % 10) >= 5)
 826                 K += 5;
 827
 828         /* Move down to proper range now rounding is done */
 829         fll_div->k = K / 10;
 830
 831         BUG_ON(target != Fout * (fll_div->fllclk_div << 2));
 832         BUG_ON(!K && target != Fref * fll_div->fll_ratio * fll_div->n);
 833
 834         return 0;
 835 }
 836
 837 static int wm8900_set_fll(struct snd_soc_codec *codec,
 838         int fll_id, unsigned int freq_in, unsigned int freq_out)
 839 {
 840         struct wm8900_priv *wm8900 = codec->private_data;
 841         struct _fll_div fll_div;
 842         unsigned int reg;
 843
 844         if (wm8900->fll_in == freq_in && wm8900->fll_out == freq_out)
 845                 return 0;
 846
 847         /* The digital side should be disabled during any change. */
 848         reg = wm8900_read(codec, WM8900_REG_POWER1);
 849         wm8900_write(codec, WM8900_REG_POWER1,
 850                      reg & (~WM8900_REG_POWER1_FLL_ENA));
 851
 852         /* Disable the FLL? */
 853         if (!freq_in || !freq_out) {
 854                 reg = wm8900_read(codec, WM8900_REG_CLOCKING1);
 855                 wm8900_write(codec, WM8900_REG_CLOCKING1,
 856                              reg & (~WM8900_REG_CLOCKING1_MCLK_SRC));
 857
 858                 reg = wm8900_read(codec, WM8900_REG_FLLCTL1);
 859                 wm8900_write(codec, WM8900_REG_FLLCTL1,
 860                              reg & (~WM8900_REG_FLLCTL1_OSC_ENA));
 861
 862                 wm8900->fll_in = freq_in;
 863                 wm8900->fll_out = freq_out;
 864
 865                 return 0;
 866         }
 867
 868         if (fll_factors(&fll_div, freq_in, freq_out) != 0)
 869                 goto reenable;
 870
 871         wm8900->fll_in = freq_in;
 872         wm8900->fll_out = freq_out;
 873
 874         /* The osclilator *MUST* be enabled before we enable the
 875          * digital circuit. */
 876         wm8900_write(codec, WM8900_REG_FLLCTL1,
 877                      fll_div.fll_ratio | WM8900_REG_FLLCTL1_OSC_ENA);
 878
 879         wm8900_write(codec, WM8900_REG_FLLCTL4, fll_div.n >> 5);
 880         wm8900_write(codec, WM8900_REG_FLLCTL5,
 881                      (fll_div.fllclk_div << 6) | (fll_div.n & 0x1f));
 882
 883         if (fll_div.k) {
 884                 wm8900_write(codec, WM8900_REG_FLLCTL2,
 885                              (fll_div.k >> 8) | 0x100);
 886                 wm8900_write(codec, WM8900_REG_FLLCTL3, fll_div.k & 0xff);
 887         } else
 888                 wm8900_write(codec, WM8900_REG_FLLCTL2, 0);
 889
 890         if (fll_div.fll_slow_lock_ref)
 891                 wm8900_write(codec, WM8900_REG_FLLCTL6,
 892                              WM8900_REG_FLLCTL6_FLL_SLOW_LOCK_REF);
 893         else
 894                 wm8900_write(codec, WM8900_REG_FLLCTL6, 0);
 895
 896         reg = wm8900_read(codec, WM8900_REG_POWER1);
 897         wm8900_write(codec, WM8900_REG_POWER1,
 898                      reg | WM8900_REG_POWER1_FLL_ENA);
 899
 900 reenable:
 901         reg = wm8900_read(codec, WM8900_REG_CLOCKING1);
 902         wm8900_write(codec, WM8900_REG_CLOCKING1,
 903                      reg | WM8900_REG_CLOCKING1_MCLK_SRC);
 904
 905         return 0;
 906 }
 907
 908 static int wm8900_set_dai_pll(struct snd_soc_dai *codec_dai,
 909                 int pll_id, unsigned int freq_in, unsigned int freq_out)
 910 {
 911         return wm8900_set_fll(codec_dai->codec, pll_id, freq_in, freq_out);
 912 }
 913
 914 static int wm8900_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 915                                  int div_id, int div)
 916 {
 917         struct snd_soc_codec *codec = codec_dai->codec;
 918         unsigned int reg;
 919
 920         switch (div_id) {
 921         case WM8900_BCLK_DIV:
 922                 reg = wm8900_read(codec, WM8900_REG_CLOCKING1);
 923                 wm8900_write(codec, WM8900_REG_CLOCKING1,
 924                              div | (reg & WM8900_REG_CLOCKING1_BCLK_MASK));
 925                 break;
 926         case WM8900_OPCLK_DIV:
 927                 reg = wm8900_read(codec, WM8900_REG_CLOCKING1);
 928                 wm8900_write(codec, WM8900_REG_CLOCKING1,
 929                              div | (reg & WM8900_REG_CLOCKING1_OPCLK_MASK));
 930                 break;
 931         case WM8900_DAC_LRCLK:
 932                 reg = wm8900_read(codec, WM8900_REG_AUDIO4);
 933                 wm8900_write(codec, WM8900_REG_AUDIO4,
 934                              div | (reg & WM8900_LRC_MASK));
 935                 break;
 936         case WM8900_ADC_LRCLK:
 937                 reg = wm8900_read(codec, WM8900_REG_AUDIO3);
 938                 wm8900_write(codec, WM8900_REG_AUDIO3,
 939                              div | (reg & WM8900_LRC_MASK));
 940                 break;
 941         case WM8900_DAC_CLKDIV:
 942                 reg = wm8900_read(codec, WM8900_REG_CLOCKING2);
 943                 wm8900_write(codec, WM8900_REG_CLOCKING2,
 944                              div | (reg & WM8900_REG_CLOCKING2_DAC_CLKDIV));
 945                 break;
 946         case WM8900_ADC_CLKDIV:
 947                 reg = wm8900_read(codec, WM8900_REG_CLOCKING2);
 948                 wm8900_write(codec, WM8900_REG_CLOCKING2,
 949                              div | (reg & WM8900_REG_CLOCKING2_ADC_CLKDIV));
 950                 break;
 951         case WM8900_LRCLK_MODE:
 952                 reg = wm8900_read(codec, WM8900_REG_DACCTRL);
 953                 wm8900_write(codec, WM8900_REG_DACCTRL,
 954                              div | (reg & WM8900_REG_DACCTRL_AIF_LRCLKRATE));
 955                 break;
 956         default:
 957                 return -EINVAL;
 958         }
 959
 960         return 0;
 961 }
 962
 963
 964 static int wm8900_set_dai_fmt(struct snd_soc_dai *codec_dai,
 965                               unsigned int fmt)
 966 {
 967         struct snd_soc_codec *codec = codec_dai->codec;
 968         unsigned int clocking1, aif1, aif3, aif4;
 969
 970         clocking1 = wm8900_read(codec, WM8900_REG_CLOCKING1);
 971         aif1 = wm8900_read(codec, WM8900_REG_AUDIO1);
 972         aif3 = wm8900_read(codec, WM8900_REG_AUDIO3);
 973         aif4 = wm8900_read(codec, WM8900_REG_AUDIO4);
 974
 975         /* set master/slave audio interface */
 976         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 977         case SND_SOC_DAIFMT_CBS_CFS:
 978                 clocking1 &= ~WM8900_REG_CLOCKING1_BCLK_DIR;
 979                 aif3 &= ~WM8900_REG_AUDIO3_ADCLRC_DIR;
 980                 aif4 &= ~WM8900_REG_AUDIO4_DACLRC_DIR;
 981                 break;
 982         case SND_SOC_DAIFMT_CBS_CFM:
 983                 clocking1 &= ~WM8900_REG_CLOCKING1_BCLK_DIR;
 984                 aif3 |= WM8900_REG_AUDIO3_ADCLRC_DIR;
 985                 aif4 |= WM8900_REG_AUDIO4_DACLRC_DIR;
 986                 break;
 987         case SND_SOC_DAIFMT_CBM_CFM:
 988                 clocking1 |= WM8900_REG_CLOCKING1_BCLK_DIR;
 989                 aif3 |= WM8900_REG_AUDIO3_ADCLRC_DIR;
 990                 aif4 |= WM8900_REG_AUDIO4_DACLRC_DIR;
 991                 break;
 992         case SND_SOC_DAIFMT_CBM_CFS:
 993                 clocking1 |= WM8900_REG_CLOCKING1_BCLK_DIR;
 994                 aif3 &= ~WM8900_REG_AUDIO3_ADCLRC_DIR;
 995                 aif4 &= ~WM8900_REG_AUDIO4_DACLRC_DIR;
 996                 break;
 997         default:
 998                 return -EINVAL;
 999         }
1000
1001         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1002         case SND_SOC_DAIFMT_DSP_A:
1003                 aif1 |= WM8900_REG_AUDIO1_AIF_FMT_MASK;
1004                 aif1 &= ~WM8900_REG_AUDIO1_LRCLK_INV;
1005                 break;
1006         case SND_SOC_DAIFMT_DSP_B:
1007                 aif1 |= WM8900_REG_AUDIO1_AIF_FMT_MASK;
1008                 aif1 |= WM8900_REG_AUDIO1_LRCLK_INV;
1009                 break;
1010         case SND_SOC_DAIFMT_I2S:
1011                 aif1 &= ~WM8900_REG_AUDIO1_AIF_FMT_MASK;
1012                 aif1 |= 0x10;
1013                 break;
1014         case SND_SOC_DAIFMT_RIGHT_J:
1015                 aif1 &= ~WM8900_REG_AUDIO1_AIF_FMT_MASK;
1016                 break;
1017         case SND_SOC_DAIFMT_LEFT_J:
1018                 aif1 &= ~WM8900_REG_AUDIO1_AIF_FMT_MASK;
1019                 aif1 |= 0x8;
1020                 break;
1021         default:
1022                 return -EINVAL;
1023         }
1024
1025         /* Clock inversion */
1026         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1027         case SND_SOC_DAIFMT_DSP_A:
1028         case SND_SOC_DAIFMT_DSP_B:
1029                 /* frame inversion not valid for DSP modes */
1030                 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
1031                 case SND_SOC_DAIFMT_NB_NF:
1032                         aif1 &= ~WM8900_REG_AUDIO1_BCLK_INV;
1033                         break;
1034                 case SND_SOC_DAIFMT_IB_NF:
1035                         aif1 |= WM8900_REG_AUDIO1_BCLK_INV;
1036                         break;
1037                 default:
1038                         return -EINVAL;
1039                 }
1040                 break;
1041         case SND_SOC_DAIFMT_I2S:
1042         case SND_SOC_DAIFMT_RIGHT_J:
1043         case SND_SOC_DAIFMT_LEFT_J:
1044                 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
1045                 case SND_SOC_DAIFMT_NB_NF:
1046                         aif1 &= ~WM8900_REG_AUDIO1_BCLK_INV;
1047                         aif1 &= ~WM8900_REG_AUDIO1_LRCLK_INV;
1048                         break;
1049                 case SND_SOC_DAIFMT_IB_IF:
1050                         aif1 |= WM8900_REG_AUDIO1_BCLK_INV;
1051                         aif1 |= WM8900_REG_AUDIO1_LRCLK_INV;
1052                         break;
1053                 case SND_SOC_DAIFMT_IB_NF:
1054                         aif1 |= WM8900_REG_AUDIO1_BCLK_INV;
1055                         aif1 &= ~WM8900_REG_AUDIO1_LRCLK_INV;
1056                         break;
1057                 case SND_SOC_DAIFMT_NB_IF:
1058                         aif1 &= ~WM8900_REG_AUDIO1_BCLK_INV;
1059                         aif1 |= WM8900_REG_AUDIO1_LRCLK_INV;
1060                         break;
1061                 default:
1062                         return -EINVAL;
1063                 }
1064                 break;
1065         default:
1066                 return -EINVAL;
1067         }
1068
1069         wm8900_write(codec, WM8900_REG_CLOCKING1, clocking1);
1070         wm8900_write(codec, WM8900_REG_AUDIO1, aif1);
1071         wm8900_write(codec, WM8900_REG_AUDIO3, aif3);
1072         wm8900_write(codec, WM8900_REG_AUDIO4, aif4);
1073
1074         return 0;
1075 }
1076
1077 static int wm8900_digital_mute(struct snd_soc_dai *codec_dai, int mute)
1078 {
1079         struct snd_soc_codec *codec = codec_dai->codec;
1080         u16 reg;
1081
1082         reg = wm8900_read(codec, WM8900_REG_DACCTRL);
1083
1084         if (mute)
1085                 reg |= WM8900_REG_DACCTRL_MUTE;
1086         else
1087                 reg &= ~WM8900_REG_DACCTRL_MUTE;
1088
1089         wm8900_write(codec, WM8900_REG_DACCTRL, reg);
1090
1091         return 0;
1092 }
1093
1094 #define WM8900_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
1095                       SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
1096                       SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
1097
1098 #define WM8900_PCM_FORMATS \
1099         (SNDRV_PCM_FORMAT_S16_LE | SNDRV_PCM_FORMAT_S20_3LE | \
1100          SNDRV_PCM_FORMAT_S24_LE)
1101
1102 struct snd_soc_dai wm8900_dai = {
1103         .name = "WM8900 HiFi",
1104         .playback = {
1105                 .stream_name = "HiFi Playback",
1106                 .channels_min = 1,
1107                 .channels_max = 2,
1108                 .rates = WM8900_RATES,
1109                 .formats = WM8900_PCM_FORMATS,
1110         },
1111         .capture = {
1112                 .stream_name = "HiFi Capture",
1113                 .channels_min = 1,
1114                 .channels_max = 2,
1115                 .rates = WM8900_RATES,
1116                 .formats = WM8900_PCM_FORMATS,
1117          },
1118         .ops = {
1119                 .hw_params = wm8900_hw_params,
1120          },
1121         .dai_ops = {
1122                  .set_clkdiv = wm8900_set_dai_clkdiv,
1123                  .set_pll = wm8900_set_dai_pll,
1124                  .set_fmt = wm8900_set_dai_fmt,
1125                  .digital_mute = wm8900_digital_mute,
1126          },
1127 };
1128 EXPORT_SYMBOL_GPL(wm8900_dai);
1129
1130 static int wm8900_set_bias_level(struct snd_soc_codec *codec,
1131                                  enum snd_soc_bias_level level)
1132 {
1133         u16 reg;
1134
1135         switch (level) {
1136         case SND_SOC_BIAS_ON:
1137                 /* Enable thermal shutdown */
1138                 reg = wm8900_read(codec, WM8900_REG_GPIO);
1139                 wm8900_write(codec, WM8900_REG_GPIO,
1140                              reg | WM8900_REG_GPIO_TEMP_ENA);
1141                 reg = wm8900_read(codec, WM8900_REG_ADDCTL);
1142                 wm8900_write(codec, WM8900_REG_ADDCTL,
1143                              reg | WM8900_REG_ADDCTL_TEMP_SD);
1144                 break;
1145
1146         case SND_SOC_BIAS_PREPARE:
1147                 break;
1148
1149         case SND_SOC_BIAS_STANDBY:
1150                 /* Charge capacitors if initial power up */
1151                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
1152                         /* STARTUP_BIAS_ENA on */
1153                         wm8900_write(codec, WM8900_REG_POWER1,
1154                                      WM8900_REG_POWER1_STARTUP_BIAS_ENA);
1155
1156                         /* Startup bias mode */
1157                         wm8900_write(codec, WM8900_REG_ADDCTL,
1158                                      WM8900_REG_ADDCTL_BIAS_SRC |
1159                                      WM8900_REG_ADDCTL_VMID_SOFTST);
1160
1161                         /* VMID 2x50k */
1162                         wm8900_write(codec, WM8900_REG_POWER1,
1163                                      WM8900_REG_POWER1_STARTUP_BIAS_ENA | 0x1);
1164
1165                         /* Allow capacitors to charge */
1166                         schedule_timeout_interruptible(msecs_to_jiffies(400));
1167
1168                         /* Enable bias */
1169                         wm8900_write(codec, WM8900_REG_POWER1,
1170                                      WM8900_REG_POWER1_STARTUP_BIAS_ENA |
1171                                      WM8900_REG_POWER1_BIAS_ENA | 0x1);
1172
1173                         wm8900_write(codec, WM8900_REG_ADDCTL, 0);
1174
1175                         wm8900_write(codec, WM8900_REG_POWER1,
1176                                      WM8900_REG_POWER1_BIAS_ENA | 0x1);
1177                 }
1178
1179                 reg = wm8900_read(codec, WM8900_REG_POWER1);
1180                 wm8900_write(codec, WM8900_REG_POWER1,
1181                              (reg & WM8900_REG_POWER1_FLL_ENA) |
1182                              WM8900_REG_POWER1_BIAS_ENA | 0x1);
1183                 wm8900_write(codec, WM8900_REG_POWER2,
1184                              WM8900_REG_POWER2_SYSCLK_ENA);
1185                 wm8900_write(codec, WM8900_REG_POWER3, 0);
1186                 break;
1187
1188         case SND_SOC_BIAS_OFF:
1189                 /* Startup bias enable */
1190                 reg = wm8900_read(codec, WM8900_REG_POWER1);
1191                 wm8900_write(codec, WM8900_REG_POWER1,
1192                              reg & WM8900_REG_POWER1_STARTUP_BIAS_ENA);
1193                 wm8900_write(codec, WM8900_REG_ADDCTL,
1194                              WM8900_REG_ADDCTL_BIAS_SRC |
1195                              WM8900_REG_ADDCTL_VMID_SOFTST);
1196
1197                 /* Discharge caps */
1198                 wm8900_write(codec, WM8900_REG_POWER1,
1199                              WM8900_REG_POWER1_STARTUP_BIAS_ENA);
1200                 schedule_timeout_interruptible(msecs_to_jiffies(500));
1201
1202                 /* Remove clamp */
1203                 wm8900_write(codec, WM8900_REG_HPCTL1, 0);
1204
1205                 /* Power down */
1206                 wm8900_write(codec, WM8900_REG_ADDCTL, 0);
1207                 wm8900_write(codec, WM8900_REG_POWER1, 0);
1208                 wm8900_write(codec, WM8900_REG_POWER2, 0);
1209                 wm8900_write(codec, WM8900_REG_POWER3, 0);
1210
1211                 /* Need to let things settle before stopping the clock
1212                  * to ensure that restart works, see "Stopping the
1213                  * master clock" in the datasheet. */
1214                 schedule_timeout_interruptible(msecs_to_jiffies(1));
1215                 wm8900_write(codec, WM8900_REG_POWER2,
1216                              WM8900_REG_POWER2_SYSCLK_ENA);
1217                 break;
1218         }
1219         codec->bias_level = level;
1220         return 0;
1221 }
1222
1223 static int wm8900_suspend(struct platform_device *pdev, pm_message_t state)
1224 {
1225         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1226         struct snd_soc_codec *codec = socdev->codec;
1227         struct wm8900_priv *wm8900 = codec->private_data;
1228         int fll_out = wm8900->fll_out;
1229         int fll_in  = wm8900->fll_in;
1230         int ret;
1231
1232         /* Stop the FLL in an orderly fashion */
1233         ret = wm8900_set_fll(codec, 0, 0, 0);
1234         if (ret != 0) {
1235                 dev_err(&pdev->dev, "Failed to stop FLL\n");
1236                 return ret;
1237         }
1238
1239         wm8900->fll_out = fll_out;
1240         wm8900->fll_in = fll_in;
1241
1242         wm8900_set_bias_level(codec, SND_SOC_BIAS_OFF);
1243
1244         return 0;
1245 }
1246
1247 static int wm8900_resume(struct platform_device *pdev)
1248 {
1249         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1250         struct snd_soc_codec *codec = socdev->codec;
1251         struct wm8900_priv *wm8900 = codec->private_data;
1252         u16 *cache;
1253         int i, ret;
1254
1255         cache = kmemdup(codec->reg_cache, sizeof(wm8900_reg_defaults),
1256                         GFP_KERNEL);
1257
1258         wm8900_reset(codec);
1259         wm8900_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1260
1261         /* Restart the FLL? */
1262         if (wm8900->fll_out) {
1263                 int fll_out = wm8900->fll_out;
1264                 int fll_in  = wm8900->fll_in;
1265
1266                 wm8900->fll_in = 0;
1267                 wm8900->fll_out = 0;
1268
1269                 ret = wm8900_set_fll(codec, 0, fll_in, fll_out);
1270                 if (ret != 0) {
1271                         dev_err(&pdev->dev, "Failed to restart FLL\n");
1272                         return ret;
1273                 }
1274         }
1275
1276         if (cache) {
1277                 for (i = 0; i < WM8900_MAXREG; i++)
1278                         wm8900_write(codec, i, cache[i]);
1279                 kfree(cache);
1280         } else
1281                 dev_err(&pdev->dev, "Unable to allocate register cache\n");
1282
1283         return 0;
1284 }
1285
1286 /*
1287  * initialise the WM8900 driver
1288  * register the mixer and dsp interfaces with the kernel
1289  */
1290 static int wm8900_init(struct snd_soc_device *socdev)
1291 {
1292         struct snd_soc_codec *codec = socdev->codec;
1293         int ret = 0;
1294         unsigned int reg;
1295         struct i2c_client *i2c_client = socdev->codec->control_data;
1296
1297         codec->name = "WM8900";
1298         codec->owner = THIS_MODULE;
1299         codec->read = wm8900_read;
1300         codec->write = wm8900_write;
1301         codec->dai = &wm8900_dai;
1302         codec->num_dai = 1;
1303         codec->reg_cache_size = WM8900_MAXREG;
1304         codec->reg_cache = kmemdup(wm8900_reg_defaults,
1305                                    sizeof(wm8900_reg_defaults), GFP_KERNEL);
1306
1307         if (codec->reg_cache == NULL)
1308                 return -ENOMEM;
1309
1310         reg = wm8900_read(codec, WM8900_REG_ID);
1311         if (reg != 0x8900) {
1312                 dev_err(&i2c_client->dev, "Device is not a WM8900 - ID %x\n",
1313                         reg);
1314                 return -ENODEV;
1315         }
1316
1317         codec->private_data = kzalloc(sizeof(struct wm8900_priv), GFP_KERNEL);
1318         if (codec->private_data == NULL) {
1319                 ret = -ENOMEM;
1320                 goto priv_err;
1321         }
1322
1323         /* Read back from the chip */
1324         reg = wm8900_chip_read(codec, WM8900_REG_POWER1);
1325         reg = (reg >> 12) & 0xf;
1326         dev_info(&i2c_client->dev, "WM8900 revision %d\n", reg);
1327
1328         wm8900_reset(codec);
1329
1330         /* Latch the volume update bits */
1331         wm8900_write(codec, WM8900_REG_LINVOL,
1332                      wm8900_read(codec, WM8900_REG_LINVOL) | 0x100);
1333         wm8900_write(codec, WM8900_REG_RINVOL,
1334                      wm8900_read(codec, WM8900_REG_RINVOL) | 0x100);
1335         wm8900_write(codec, WM8900_REG_LOUT1CTL,
1336                      wm8900_read(codec, WM8900_REG_LOUT1CTL) | 0x100);
1337         wm8900_write(codec, WM8900_REG_ROUT1CTL,
1338                      wm8900_read(codec, WM8900_REG_ROUT1CTL) | 0x100);
1339         wm8900_write(codec, WM8900_REG_LOUT2CTL,
1340                      wm8900_read(codec, WM8900_REG_LOUT2CTL) | 0x100);
1341         wm8900_write(codec, WM8900_REG_ROUT2CTL,
1342                      wm8900_read(codec, WM8900_REG_ROUT2CTL) | 0x100);
1343         wm8900_write(codec, WM8900_REG_LDAC_DV,
1344                      wm8900_read(codec, WM8900_REG_LDAC_DV) | 0x100);
1345         wm8900_write(codec, WM8900_REG_RDAC_DV,
1346                      wm8900_read(codec, WM8900_REG_RDAC_DV) | 0x100);
1347         wm8900_write(codec, WM8900_REG_LADC_DV,
1348                      wm8900_read(codec, WM8900_REG_LADC_DV) | 0x100);
1349         wm8900_write(codec, WM8900_REG_RADC_DV,
1350                      wm8900_read(codec, WM8900_REG_RADC_DV) | 0x100);
1351
1352         /* Set the DAC and mixer output bias */
1353         wm8900_write(codec, WM8900_REG_OUTBIASCTL, 0x81);
1354
1355         /* Register pcms */
1356         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
1357         if (ret < 0) {
1358                 dev_err(&i2c_client->dev, "Failed to register new PCMs\n");
1359                 goto pcm_err;
1360         }
1361
1362         /* Turn the chip on */
1363         codec->bias_level = SND_SOC_BIAS_OFF;
1364         wm8900_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1365
1366         wm8900_add_controls(codec);
1367         wm8900_add_widgets(codec);
1368
1369         ret = snd_soc_register_card(socdev);
1370         if (ret < 0) {
1371                 dev_err(&i2c_client->dev, "Failed to register card\n");
1372                 goto card_err;
1373         }
1374         return ret;
1375
1376 card_err:
1377         snd_soc_free_pcms(socdev);
1378         snd_soc_dapm_free(socdev);
1379 pcm_err:
1380         kfree(codec->reg_cache);
1381 priv_err:
1382         kfree(codec->private_data);
1383         return ret;
1384 }
1385
1386 static struct snd_soc_device *wm8900_socdev;
1387
1388 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1389
1390 static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
1391
1392 /* Magic definition of all other variables and things */
1393 I2C_CLIENT_INSMOD;
1394
1395 static struct i2c_driver wm8900_i2c_driver;
1396 static struct i2c_client client_template;
1397
1398 /* If the i2c layer weren't so broken, we could pass this kind of data
1399    around */
1400 static int wm8900_codec_probe(struct i2c_adapter *adap, int addr, int kind)
1401 {
1402         struct snd_soc_device *socdev = wm8900_socdev;
1403         struct wm8900_setup_data *setup = socdev->codec_data;
1404         struct snd_soc_codec *codec = socdev->codec;
1405         struct i2c_client *i2c;
1406         int ret;
1407
1408         if (addr != setup->i2c_address)
1409                 return -ENODEV;
1410
1411         dev_err(&adap->dev, "Probe on %x\n", addr);
1412
1413         client_template.adapter = adap;
1414         client_template.addr = addr;
1415
1416         i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
1417         if (i2c == NULL) {
1418                 kfree(codec);
1419                 return -ENOMEM;
1420         }
1421         i2c_set_clientdata(i2c, codec);
1422         codec->control_data = i2c;
1423
1424         ret = i2c_attach_client(i2c);
1425         if (ret < 0) {
1426                 dev_err(&adap->dev,
1427                         "failed to attach codec at addr %x\n", addr);
1428                 goto err;
1429         }
1430
1431         ret = wm8900_init(socdev);
1432         if (ret < 0) {
1433                 dev_err(&adap->dev, "failed to initialise WM8900\n");
1434                 goto err;
1435         }
1436         return ret;
1437
1438 err:
1439         kfree(codec);
1440         kfree(i2c);
1441         return ret;
1442 }
1443
1444 static int wm8900_i2c_detach(struct i2c_client *client)
1445 {
1446         struct snd_soc_codec *codec = i2c_get_clientdata(client);
1447         i2c_detach_client(client);
1448         kfree(codec->reg_cache);
1449         kfree(client);
1450         return 0;
1451 }
1452
1453 static int wm8900_i2c_attach(struct i2c_adapter *adap)
1454 {
1455         return i2c_probe(adap, &addr_data, wm8900_codec_probe);
1456 }
1457
1458 /* corgi i2c codec control layer */
1459 static struct i2c_driver wm8900_i2c_driver = {
1460         .driver = {
1461                 .name = "WM8900 I2C codec",
1462                 .owner = THIS_MODULE,
1463         },
1464         .attach_adapter = wm8900_i2c_attach,
1465         .detach_client =  wm8900_i2c_detach,
1466         .command =        NULL,
1467 };
1468
1469 static struct i2c_client client_template = {
1470         .name =   "WM8900",
1471         .driver = &wm8900_i2c_driver,
1472 };
1473 #endif
1474
1475 static int wm8900_probe(struct platform_device *pdev)
1476 {
1477         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1478         struct wm8900_setup_data *setup;
1479         struct snd_soc_codec *codec;
1480         int ret = 0;
1481
1482         dev_info(&pdev->dev, "WM8900 Audio Codec\n");
1483
1484         setup = socdev->codec_data;
1485         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
1486         if (codec == NULL)
1487                 return -ENOMEM;
1488
1489         mutex_init(&codec->mutex);
1490         INIT_LIST_HEAD(&codec->dapm_widgets);
1491         INIT_LIST_HEAD(&codec->dapm_paths);
1492
1493         socdev->codec = codec;
1494
1495         codec->set_bias_level = wm8900_set_bias_level;
1496
1497         wm8900_socdev = socdev;
1498 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1499         if (setup->i2c_address) {
1500                 normal_i2c[0] = setup->i2c_address;
1501                 codec->hw_write = (hw_write_t)i2c_master_send;
1502                 ret = i2c_add_driver(&wm8900_i2c_driver);
1503                 if (ret != 0)
1504                         printk(KERN_ERR "can't add i2c driver");
1505         }
1506 #else
1507 #error Non-I2C interfaces not yet supported
1508 #endif
1509         return ret;
1510 }
1511
1512 /* power down chip */
1513 static int wm8900_remove(struct platform_device *pdev)
1514 {
1515         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1516         struct snd_soc_codec *codec = socdev->codec;
1517
1518         if (codec->control_data)
1519                 wm8900_set_bias_level(codec, SND_SOC_BIAS_OFF);
1520
1521         snd_soc_free_pcms(socdev);
1522         snd_soc_dapm_free(socdev);
1523 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1524         i2c_del_driver(&wm8900_i2c_driver);
1525 #endif
1526         kfree(codec);
1527
1528         return 0;
1529 }
1530
1531 struct snd_soc_codec_device soc_codec_dev_wm8900 = {
1532         .probe =        wm8900_probe,
1533         .remove =       wm8900_remove,
1534         .suspend =      wm8900_suspend,
1535         .resume =       wm8900_resume,
1536 };
1537 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8900);
1538
1539 MODULE_DESCRIPTION("ASoC WM8900 driver");
1540 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
1541 MODULE_LICENSE("GPL");